Flip top adjustable threshold cap



FIG. 1 is a front right perspective of our new design in an open position;

FIG. 2 is a front right perspective thereof in a closed position;

FIG. 3 is a side view thereof in the open position, the opposite side being a mirror image thereof; and,

FIG. 4 is a front right perspective, showing additional environmental elements.

The dashed lines in the Figures refer to environmental elements only and form no part of the claimed design. The break lines in FIGS. 1, 2 and 4 indicate indefinite length. 

The ornamental design for a flip top adjustable threshold cap, as shown and described. 